girls. and no matter where you are. >> i think a fluke. i think it's a coincidence. >> reporter: most merchants say they find san raphael relatively safe and well patrolled. >> i am just going to be more aware, especially when i lock up. >> there is always people who you think will follow you home. >> reporter: these teenagers say they are often honked and whistled at by strangers and know what they would do if accosted. >> get my cell phone and call 911. >> right away. >> and i mean if it's starting to get physical, you just like kick them where it hurts. >> reporter: well, what police are doing now is looking through their files of known sex offenders to see if any of these cases matchup. and what they want the public to do is be very watchful for any of this aggressive behavior in this busy downtown. reporting live in san raphael, deborah villalon, ktvu, channel 2 news. the interim police chief in santa cruz says he has contracted a private security firm to help patrol downtown.